Detection of QTL for growth rate in the blacklip abalone (Haliotis rubra Leach) using selective DNA pooling

M Baranski, M Rourke, Stephen Loughnan, B Hayes, Chris Austin, N Robinson

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    Abstract

    The objective of this study was to identify QTL for growth rate in the blacklip abalone Haliotis rubra using selective DNA pooling. Three full-sibling families of H. rubra derived from crosses of wild broodstock were used. DNA was extracted from the largest and smallest 10% of progeny and combined into two pools for each phenotypic tail. The DNA pools were typed with 139 microsatellites, and markers showing significant differences between the peak height ratios of alleles inherited from the parents were individually genotyped and analysed by interval mapping. A strong correlation (r = 0.94, P < 0.001) was found between the t-values from the analysis of pools and the t-values from the analysis of individual genotypes. Based on the interval mapping analysis, QTL were detected on nine linkage groups at a chromosome-wide P < 0.01 and one linkage group at a chromosome-wide P < 0.05. The study demonstrated that selective DNA pooling is efficient and effective as a first-pass screen for the discovery of QTL in an aquaculture species. � 2008 The Authors.
    Original languageEnglish
    Pages (from-to)606-614
    Number of pages9
    JournalAnimal Genetics
    Volume39
    Issue number6
    Publication statusPublished - 2008

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    Baranski, M., Rourke, M., Loughnan, S., Hayes, B., Austin, C., & Robinson, N. (2008). Detection of QTL for growth rate in the blacklip abalone (Haliotis rubra Leach) using selective DNA pooling. Animal Genetics, 39(6), 606-614.